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ECU (Engine Control Unit)
This is the brain of the whole network and is essentially the computer running your car.
The ECU unit is usually of sturdy and quality design (they must be in order to survive the harsh environment of the car).
Problems are rarely caused by the unit itself, rather by external causes.
Most problems usually come from:
Troubleshooting procedure:
If the ECU unit is faulty, a complete replacement should be done
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